Open source focus
Open Source Alternatives to Duo Security
60 open source Authentication options similar to Duo Security, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Each profile notes license and self-hosting where we have it.
Ping Identity60Identity & Access Management (IAM)Denver, United States$111.0MOpen source
Okta79SaaSSan Francisco, United States$187.0MOpen source
WorkOS71Developer ToolsSan Francisco, United States$198.0MOpen source
Controlsecurity18CybersecurityTel Aviv, IsraelOpen source
Aemetis15Climate TechCupertino, United StatesOpen source · Self-hostable
RSA10CybersecurityBedford, United StatesOpen source
Auth075Identity & Access Management (IAM)Bellevue, United States$282.4MOpen source
- FOForgeRock48Identity & Access Management (IAM)San Francisco, United States$220.0M
Open source
ORY47Identity & Access ManagementBerlin, Germany$17.0MOpen source · Self-hostable
Slauth.io43EnterpriseAshburn, United States$1.5MOpen source · Self-hostable
MeritsecurityCybersecurityOpen source
SafeBreach69EnterpriseTel Aviv, Israel$140.5MOpen source
Teleport69CybersecurityOakland, United States$190.0MOpen source
Coro65EnterpriseNew York, United States$235.0MOpen source
Seemplicity61EnterpriseTel Aviv, Israel$182.0MOpen source
Token Security57EnterpriseSan Francisco, United States$27.0MOpen source
SecuredTouch53BiometricsDenver, United States$11.5MOpen source
Appgate50CybersecurityMiami, United StatesOpen source
Torch Security49CybersecurityLeawood, United StatesOpen source
Palo Alto Networks Cortex XDR23CybersecuritySanta Clara, United StatesOpen source
0sec11CybersecurityTel Aviv, IsraelOpen source · Self-hostable
Citcall10CybersecurityJakarta, IndonesiaOpen source
Vanta75CybersecuritySan Francisco, United States$154.0MOpen source
Talon Cyber Security69EnterpriseNew York, United States$126.0MOpen source
Perception Point65EnterpriseTel Aviv, Israel$38.0MOpen source
- YUYubico63CybersecurityStockholm, Sweden
Open source
Demisto62EnterpriseSan Francisco, United States$69.0MOpen source
Team Cymru62CybersecurityOrem, USA$63.0MOpen source
Twingate61CybersecurityRedwood City, United States$62.0MOpen source
Red Canary61CybersecurityDenver, United States$90.0MOpen source
Twistlock60EnterpriseSan Francisco, United States$62.8MOpen source
Mend60Open SourceTel Aviv, Israel$121.5MOpen source · Self-hostable
Clutch Security59CybersecuritySan Francisco, United States$10.0MOpen source
Backslash Security57CybersecurityTel Aviv, Israel$27.0MOpen source
Descope54EnterpriseSan Francisco, United States$53.0MOpen source
Ironblocks54EnterpriseTel Aviv, Israel$7.0MOpen source
Knostic54Cybersecurity$14.3MOpen source
Piiano54EnterpriseTel Aviv, Israel$9.0MOpen source
Talon54CybersecurityTel Aviv, Israel$169.0MOpen source
KTrust54EnterpriseTel Aviv, Israel$5.3MOpen source
LoginRadius53Identity & Access ManagementVancouver, CanadaOpen source
Oplane49CybersecurityMalmö, Sweden$4.5MOpen source
AppViewX47CybersecurityNashua, USA$2.0MOpen source
Axiom Security45EnterpriseSan Francisco, United States$11.0MOpen source
TandemTrace35Agentic AIOpen source
SSL.com25CybersecurityTacoma, United StatesOpen source
GeeTest CAPTCHA25CybersecurityShanghai, ChinaOpen source
Crossid.io24Zero TrustTel Aviv, IsraelOpen source
Anchor.dev13CybersecuritySan Francisco, United StatesOpen source
Falco10CybersecurityOpen source · Self-hostable
Re VerifyWebsite VerificationOpen source
ExploitshieldCybersecurityOpen source
1Password85CybersecurityToronto, Canada$1.2BOpen source
Snyk85AI Coding AssistantBoston, United States$488.5MOpen source · Self-hostable
Aqua Security69EnterpriseSan Francisco, United States$400.5MOpen source
Expel66CybersecurityHerndon, United States$267.8MOpen source
Zenity66CybersecuritySan Francisco, United States$59.5MOpen source
Aikido Security65CybersecurityGhent, Belgium$84.4MOpen source
RAD Security64CybersecurityTel Aviv, Israel$29.0MOpen source
Intezer63EnterpriseTel Aviv, Israel$58.0MOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Ping Identity | Identity & Access Management (IAM) | Open source | Denver, United States | $111.0M | 60 | |
| Okta | SaaS | Open source | San Francisco, United States | $187.0M | 79 | |
| WorkOS | Developer Tools | Open source | San Francisco, United States | $198.0M | 71 | |
| Controlsecurity | Cybersecurity | Open source | Tel Aviv, Israel | — | 18 | |
| Aemetis | Climate Tech | Open source · Self-hostable | Cupertino, United States | — | 15 | |
| RSA | Cybersecurity | Open source | Bedford, United States | — | 10 | |
| Auth0 | Identity & Access Management (IAM) | Open source | Bellevue, United States | $282.4M | 75 | |
| FOForgeRock | Identity & Access Management (IAM) | Open source | San Francisco, United States | $220.0M | 48 | |
| ORY | Identity & Access Management | Open source · Self-hostable | Berlin, Germany | $17.0M | 47 | |
| Slauth.io | Enterprise | Open source · Self-hostable | Ashburn, United States | $1.5M | 43 | |
| Meritsecurity | Cybersecurity | Open source | — | — | — | |
| SafeBreach | Enterprise | Open source | Tel Aviv, Israel | $140.5M | 69 | |
| Teleport | Cybersecurity | Open source | Oakland, United States | $190.0M | 69 | |
| Coro | Enterprise | Open source | New York, United States | $235.0M | 65 | |
| Seemplicity | Enterprise | Open source | Tel Aviv, Israel | $182.0M | 61 | |
| Token Security | Enterprise | Open source | San Francisco, United States | $27.0M | 57 | |
| SecuredTouch | Biometrics | Open source | Denver, United States | $11.5M | 53 | |
| Appgate | Cybersecurity | Open source | Miami, United States | — | 50 | |
| Torch Security | Cybersecurity | Open source | Leawood, United States | — | 49 | |
| Palo Alto Networks Cortex XDR | Cybersecurity | Open source | Santa Clara, United States | — | 23 | |
| 0sec | Cybersecurity | Open source · Self-hostable | Tel Aviv, Israel | — | 11 | |
| Citcall | Cybersecurity | Open source | Jakarta, Indonesia | — | 10 | |
| Vanta | Cybersecurity | Open source | San Francisco, United States | $154.0M | 75 | |
| Talon Cyber Security | Enterprise | Open source | New York, United States | $126.0M | 69 | |
| Perception Point | Enterprise | Open source | Tel Aviv, Israel | $38.0M | 65 | |
| YUYubico | Cybersecurity | Open source | Stockholm, Sweden | — | 63 | |
| Demisto | Enterprise | Open source | San Francisco, United States | $69.0M | 62 | |
| Team Cymru | Cybersecurity | Open source | Orem, USA | $63.0M | 62 | |
| Twingate | Cybersecurity | Open source | Redwood City, United States | $62.0M | 61 | |
| Red Canary | Cybersecurity | Open source | Denver, United States | $90.0M | 61 | |
| Twistlock | Enterprise | Open source | San Francisco, United States | $62.8M | 60 | |
| Mend | Open Source | Open source · Self-hostable | Tel Aviv, Israel | $121.5M | 60 | |
| Clutch Security | Cybersecurity | Open source | San Francisco, United States | $10.0M | 59 | |
| Backslash Security | Cybersecurity | Open source | Tel Aviv, Israel | $27.0M | 57 | |
| Descope | Enterprise | Open source | San Francisco, United States | $53.0M | 54 | |
| Ironblocks | Enterprise | Open source | Tel Aviv, Israel | $7.0M | 54 | |
| Knostic | Cybersecurity | Open source | — | $14.3M | 54 | |
| Piiano | Enterprise | Open source | Tel Aviv, Israel | $9.0M | 54 | |
| Talon | Cybersecurity | Open source | Tel Aviv, Israel | $169.0M | 54 | |
| KTrust | Enterprise | Open source | Tel Aviv, Israel | $5.3M | 54 | |
| LoginRadius | Identity & Access Management | Open source | Vancouver, Canada | — | 53 | |
| Oplane | Cybersecurity | Open source | Malmö, Sweden | $4.5M | 49 | |
| AppViewX | Cybersecurity | Open source | Nashua, USA | $2.0M | 47 | |
| Axiom Security | Enterprise | Open source | San Francisco, United States | $11.0M | 45 | |
| TandemTrace | Agentic AI | Open source | — | — | 35 | |
| SSL.com | Cybersecurity | Open source | Tacoma, United States | — | 25 | |
| GeeTest CAPTCHA | Cybersecurity | Open source | Shanghai, China | — | 25 | |
| Crossid.io | Zero Trust | Open source | Tel Aviv, Israel | — | 24 | |
| Anchor.dev | Cybersecurity | Open source | San Francisco, United States | — | 13 | |
| Falco | Cybersecurity | Open source · Self-hostable | — | — | 10 | |
| Re Verify | Website Verification | Open source | — | — | — | |
| Exploitshield | Cybersecurity | Open source | — | — | — | |
| 1Password | Cybersecurity | Open source | Toronto, Canada | $1.2B | 85 | |
| Snyk | AI Coding Assistant | Open source · Self-hostable | Boston, United States | $488.5M | 85 | |
| Aqua Security | Enterprise | Open source | San Francisco, United States | $400.5M | 69 | |
| Expel | Cybersecurity | Open source | Herndon, United States | $267.8M | 66 | |
| Zenity | Cybersecurity | Open source | San Francisco, United States | $59.5M | 66 | |
| Aikido Security | Cybersecurity | Open source | Ghent, Belgium | $84.4M | 65 | |
| RAD Security | Cybersecurity | Open source | Tel Aviv, Israel | $29.0M | 64 | |
| Intezer | Enterprise | Open source | Tel Aviv, Israel | $58.0M | 63 |